Gas-governor.



W. IVI.4 WOOD.

GAS GOVERNOR.

APPLICATION FILED Nov, 27, I9I5.

Patented Nov. 28, 1916.

2 SHEETS-SHEET I.

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GAS GOVERNOR.

APPLICATION FILED Nov. 27. I9I5.

Patented N w28, 1916.

2 SHEETS-SHEET Z.

WILLIAM IVI. WOOD, 0F PHILADELPHIA, PE

NNSYLVANIA, .assIefNoRv 'ro THE NITED l GAS IMPROVEMENT COMPANY. OF PHILADELPHIA, PENNSYLVANIA, A CORPORA- Tron or rENNSYLVANIA.

.i .accesa To all whom it may concern Be it known that I. YViLLiA-M Musoimvn lVoop. a citizen of the United States, and a resident of Philadelphia. in the county of Philadelphia and State ,of Pennsylvania,

have invented certain new and use-ful Inr' provenients 1n' Gas-Governors, of which the followingis a specification.

A gas pressure' regulatoror governor isdependent for its operation upon a flexible diaphragm carrying a centrally disposed weight which is supported by the gas pressure. The pressure regulation is. not uniform for various rates of gas flow because the effective pressure area4 of the diaphragm changes with thel various positions of the centrally disposed .weight due to thefiexible annular port-ion of the diaphragm between the rim of the weight andthe support 'for the edge of the diaphragm.

The principal object of the present invention is toincrease thel uniformityT of regulation of such governors and to this end, stated generally, the invention comprises the provlsion, or combination with such governors,

of mechanism for automatically loading and unloading the diaphragm in accordance with the changing increments of effective area.

The invention .will be claimed at the end "f hereof. but will be first described in connection with the embodiment of it chosen for illustration in the accompanying drawings y in which- Figure 1, is a longitudinal sectional-view of a gas governor provlded with mechanisin embodying"features'of the invention. Fig. f2, is a transverse sectional view of the same. Fig. 3. is a diagrammatic view illus; trating the changing effective area of the diaphragm. Fig. -l,`is a longitudinal sectional view -illustrating a modification of the invention, and Fig. 5. is a diagram to which reference will be hereinafter made.

Then the weight 1, and the diaphragm are. for example. in the position shown by full lines in Fig. 3, the eii'ectivel area of the diaphragm is measured by the diameter indicated by the arrow Q, but when the weight and diaphragm are in the 4position indicated by dotted lines, the diameter of its effective area. is indicated by the arrow 3, which'is evidently' much greater than the diameter 2, and in intermediate' 'positions there are corresponding changes in the effective area of the diaphragm. This vmeans that as the Specification of Letters Patent.

the diaphragm and its weight a. reverse action when the 'weight is turned i diaphragm,

Gas-GOVERNOR.

Patented Nov. 2. lltldl.

Applicatonled November 27, 1915. Serial No. 63,866.

rate of fiow ofgas is increased atthe house connection l of the governorthe pressure of' the gas 1s decreased more than with the revverse of`this action when the rate of flow of gas is diminished. This is due to the above described changing effect-ive area of the diaphragm as the, same changes its po sition. In Fig.. 5, the line a-b, indicates the pressure due to the described operation of the diaphragm. This diaphragm operates the valve 5, which is` connected to the short end of a lever 7, pivoted at 8, and connected with a stem 9, of the diaphragm. By my invention weight is added to and subtracted from the diaphragm and its connected parts 0-cZ, in Fig. 5. This dotted line c-,d, in' Fig. 5, shows the pressure equivalent of this added weight as` compared with the line a-b. The result of the added weight is to produce a substantially uniform pressure a-e, at the voutletI 4, for all positions of Awithin the capacity of the governor.

As shown in Figs. land 2, 10 is a- Weight pivoted at 11, and shown as consisting of two lobes straddling the spindle 9, and each of about the shape in cross-section of the third of a circle. By means of links .12, this weight is connected with the spindle 9.

V As the invention is not limited to a weight, T have illustrated its equivalent in the spring 13, Fig. 4, connected with the arm 14,

of the bell-crank pivoted at 15, and having its other end-16, connected by slot-and-,pin connection \vith the spindle 9.y As the dia# phragm descends, the weight 10, `is turned counterclockwi'se in Fig. 1', its effect upon the diaphragm'constantly increasing, with clockwise by the diaphragm being raised.

' The .eii'ect of the spring 13, Fig. 4, alsoin- `creases as the arm lei, is turned counterclockwise byA thediaphragm' descending with the reverse effect when the arm 14, is turned clockwise.y The dotted line c-'Z, Fig. 5. A illustrates this change of effectl of the spring or theweiglit upon the diaphragm and this changing effec-t'ofisets or neutraliies the effeet due to the changing effective area of the l so that the pressure at the out-.f let 4, is substantially constant within the capacity of the governor. What I claim isr. .1.'lln a gas governor vthe combination of 1 as indicated by the dotted line' a rim supported fiexible diaphragm and its valveconnectlon, a welght applied to the diaphragm to balance the. gas pressure, and

-nieans for automatically loading and unvto produce a uniform loading the .diaphragm to-compensat for variations in theeective area thereof and gas pressure, substantially as described.

2. Ingas governor the combination of a rinl supported fiexible diaphragm and its valve connection, a weight applied to the l dlaphragin to balance the `gas pressur a pivotal Weight .-for automaticall)v loading and Vunloading the diaphragm to compensate for variations in' the' effective 'area thereof, and means for supporting the pivotal Weight inunstable stan-tially as described.

3. In -a gas governor a 'rim supported flexible diaphragm and its equilibrium, subthe combinationof l valve connections, a. weight applied to the diaphragm to balance the gas pressure, and

a pivotalwveight for automaticall)v loading and unloading the diaphragm to compensate for variations in the effective area thereof, substantialbv as described.

l. n a gas governor the 'combination of a Weighted `rim-supported flexibley diaphragm, a. spindle and valve-,co11nectio11s for the. diaphragm, a pivotal weight overhanging its support and provided with lobes straddling the spindle, and links interposed between the Weight and spindle, substantially as described.

v In testimony whereof I have hereunto signed my name.

WILLIAM M. WOOD. Witnesses:

CLIFFORD K. CAssEL, FRANK E. FRENCH. 

